2598221664 has 192 divisors, whose sum is σ = 7823692800. Its totient is φ = 838439424.

The previous prime is 2598221653. The next prime is 2598221677. The reversal of 2598221664 is 4661228952.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4425979 + ... + 4426565.

It is an arithmetic number, because the mean of its divisors is an integer number (40748400).

Almost surely, 2^2598221664 is an apocalyptic number.

2598221664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2598221664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3911846400).

2598221664 is an abundant number, since it is smaller than the sum of its proper divisors (5225471136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2598221664 is a wasteful number, since it uses less digits than its factorization.

2598221664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762 (or 748 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 2598221664 is about 50972.7541339489. The cubic root of 2598221664 is about 1374.7552911515.

The spelling of 2598221664 in words is "two billion, five hundred ninety-eight million, two hundred twenty-one thousand, six hundred sixty-four".